<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
    private $_id;
	/**
	 * Authenticates a user.
	 * 
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	public function authenticate()
	{
         $record = User::model()->findByAttributes(array('user_name'=>$this->username));  
         if($record===null)  
             $this->errorCode=self::ERROR_USERNAME_INVALID;  
         else if($record->password!==md5($this->password))  
             $this->errorCode=self::ERROR_PASSWORD_INVALID;  
         else  
         {  
             $this->_id=$record->user_id;  
             $this->setState('role', $record->role);
             $this->errorCode=self::ERROR_NONE;  
         }  
         return !$this->errorCode;  

	}

    public function getId() {
        return $this->_id;
    }
    
}
